Brush-holder.



E. R. 'KNGHTlv BRUSH HOLDER.

APPLIOATION Hmm AUG. so, 1905.

E. R. KNIGHT.

BRUSH HOLDBE. APPLIGATIUN FILED AUG. 30. 1905.

Patented mv. 16, 1999.

2 SHEETS-SHEET 2.

Mhz @ges f brush-holder Which eaasea. Y

' overcoming mustn n. KNIGHT, or NonWoon,

orrioa OHIOMASSIGNOR TO THE BULLOCK ELECTRIC MANU-'- FACTURING COMPANY, A. CORPORATION OF OHIO.

To all whom it may concern: n

Be it known that I, EARLE R. KNIGHT, citizen of the United States, residing at Norwood, in the county of Hamilton and plates 9,helda State ot' Ohio, have invented certain new and useful Improvements in Brush-Holders, of which the following is a full, clear,

-and exact specification.

This invention relates to brush-liolders for dynamo-electric machines.

The object of my invention is to provide a is simple in construction, easy and inexpensive to manufacture, consists of few parts, and still is very durable, rigid, and highly efficient, and my invention consists in the details'of construction, arrangement of parts, and combination of elements described in the 'specification and set forth in the appended claims.

- 4Heretofore it has been customary to construct brush-holders of cast-metal parts which necessitates considerable cost and labor, and the brush-holders so constructed are cumbersome and not very durable. In these objections, I construct my brush-holder almost entirely of sheet metal i punchings, of very vfew parts.

For a more complete understanding of "my invention reference is had to the accompanying drawings in which I have shown one form of my invention.

Figure l is an elevation of a portion of a dynamo-electric lmachine, having mounted thereon three of ers; Fig. 2 isa sectional elevation through one of my brush-holders showing the brush l in contact With a portion Vof a l eommutator; ig. 3 is a lrear lelevation of my brush-holder;

Fig. el is a detail view of one of my sidel 5 is an elevation of the forplates; and Fig. Ward portion of my holder showing espeeially the manner of securing to the -side plates my spacing plate and brush guide. In Fig. 1 I have shown a portion of a brush supporting yoke l, mounted in bearings one of which is shown at 2. y Extending from the yoke is a rigid arm 3,;.to which is adjustably held by arms 4 a brush-holder stud 5, on which may be mounted as many brush-holders as desired. yI have in this instance shown on the stud three of my improved brush-holders 6, carrying' brushes 7, Which bear on the commutator 8. It is to be understood that there are a number of such my improved brush-hold! BRUSH-HOLDER.

Specification of Letters Patent. Application led August 30, 1905. Serial N o. 276,375.

drical in outline and Patented N ov. 16, 1909..

brush holder studs arranged at regular intervals about the yoke.

My brush-liolder is composed of two side predetermined distance apart by the spacing or connecting ranged at right angles to the side plates, and by the tubes or vrods ll and l2 carrying spacing sleeves 13. lhe side plates are punched from sheet metal and are of the shape shown in Fig. fl, the part indicated by dotted lines inthe figure being bent at right angles tothe main portion, as shown at 14, to form a portion of the brush guide or socket. Each plate has openingslo and 16 to receive the spacing tubes or rods, an openingvl to receive a rivet or other support for the pressure finger hereinafter described, an opening 18 to receive the supporting stud, and a plurality of openings la arranged in a line parallel to the bent portion'lel to receive lugs 20 of the spacing plate 10.' The plate portion 10, a curved or arched portion 10b, and a flat end piece 10c bent substantially at right angles to the curved portion. l1`he end piece l0 is slotted tion 10d is bent upward as shown, for purposes to be explained later. ,n

When assembled the side plates are held a predetermined distance apart by the plato l0, the lugs 2() of which fit into the openings 19, and by the tubes l1 and l2 carrying the sleeves 13. The lugs 20 which extend through the openings 19 are riveted, forming enlarged heads, and the ends of the tubes are beaded or expanded. Adjacent each side plate are two curved sheet metal straps 2l, each being riveted at one end to the plate 10. |lhe opposite end ot' each strap is perforated to receive a screw By means of the screw and nut 22 strap is held to the portion 10 of the fplate 10, (as .is shownin Figs'. 2 and 8).

1t is seen that the curved strap 21 and the curved portion 10o are substantially cylin- 'orm good bearings for the supporting studs. By adjusting the screws tlie straps can be caused to grip the stud and liold the brush-holder in any position along the stud. Each side plate 9 has an integral lug 23 adapted to lit into a corresponding recess or slot 24 in the stud, to prevent the brush from rotating on the Stud after it has been clamped in place.

each

hammered or ioo The brush 7 is adapted to slide. freely l toward or away from the cominutator in the brush socket formed by the side plates 9 and plate l0. v.A iexible terminal or shunt 25 is connected at one end to the upwardly extending portion l0,and held by a screw or rivet '26 to the brush, the head or nut of which is received in the slot or opening between the outer end portions Il of the holder.

'lhe pressure nger or arm consists of two sheet metal curved or arched side pieces 2? held a predetermined distance apart by the tubes or rivets spacing sleeves 239. The pressure finger is secured at one end to the rear of the brushholder preferably by rivets or eyelets 29. The free end of the linger is provided with a loose sleeve or roller 30 which hears upon the brush. The outer end of the' pressure finger is held yieldingly against the brush by the spring .31. 'lhe -lower end of the spring is fastened to the strap 32 mounted 1 upon the lower tube l2 and its spacing sleeve 13, but insulated therefrom by the sleeve 33,

of insulating material. This arrangement prevents the How of current through the spring 31, savingfthe same from injury due to such current tiow. The upper end of the spring 31 is attached to the rod 3d which is adjustable in not-ches 35 formed in the nger 27. I

Iiaving thus described my invention, what I claiml as new and desire to secure by Letters Patent is l. In a brush holder, a pair of side plates,

and a separate sheet metal spacing plate therefor, said spacing plate having a curved or arched portion and a portion forming a. guide for a brush.

2. A brush-holder comprising side plates and a separate curvedor arched connectingplate intermediate the ends of the side plates, said connecting-plate forming a bearing for the brush-holder stud.

3. In a brush-holder, side plates and a connecting-plate, said side plates having openings, ,and said connecting-plate having a curved or arched portion adapted to receive the supportin stud.

4. In a brush-hoder, parallel side plates having openings to receive a supporting stud, and a spacing plate, all said plates being formed of sheet metal punchings, said spacing plate having an upper portion bent to form a bearing for the supporting stud.

5. In a brush-holder, parallel side plates, and a connecting-plate for holding said side plates a predetermined distance apart, said connecting-plate having a flat portion forming a brush guide and an upper portion curved to receive a supporting stud.

6. In a brush-holder, side plates having openings to receive a supporting stud, and a plate made from a sheet metal punching con- -23 on which are mounted nected to said side plates and holding the latter a predetermined distance apart, said connecting-plate having a flat brush guiding portion and an arched or curved portion conforming partially in shape to the openvings in -the side plates and alined therewith to form a bearing surface for the supporting stud.

7.11my a brush-holder, two side plates, a connecting-plate having a curved or arched portion, and a strap secured thereto having an oppositely'rurved portion, the curved portions bein adapted to-,receive and form a bearing sur ace for the supporting stud.

'8. In a brush-hol ler,two side plates, a connecting-plate having a portion curved or arched to receive a supporting stud, a curved or arched strap secured at one end toV the connecting-plate, and means foradjustably holding the outer free ends of said strap and connecting-plate.

` 9. In combination, a brush supporting stud, a brush-holder thereon having a pair of side plates and a connecting-plate having a portion bent partially around the supporting stud and having a free outer end, a pair of stud holding straps secured to the connecting-plate at their ends and portions forming with the bent ortion on the connecting-plate a substantial y cylindrical bearing surface, and means for adjustably holding the free outer ends of the connectin -plate and straps whereby the brushho der will he adjustably'clamped on the supporting stud. y

10. In combination, a brush sup orting stud, a brush-holder having side Fates, a connecting-plate having a brush gui ing surface, a curved or arched portion and a free outer end, a pair of' straps each connected at one end to the connecting-plate and curved oppositely to the curved or arched.

portion thereof connecting-plate ing stud, means forming with the curved a bearing for the supportfor adjustably holding the straps and' connecting-plate in engavement .with the stud, and means` for attaching a. flexible brush lead to the free outer end of the connecting-plate.

- 11. In a brush-holder, side plates, and a having bentv connecting-plate forming a brush guide, said connecting-plate having a flexibleextension, and means cooperating with said flexible eX- tension and forming clamping means for securing the brush holder to a support.

l2. In a brush-holder, side plates, a. connecting-plate for holding the side plates a redetermined distance a art, said connecting plate having a flexib e extension formin art of the clamping means for holdin the Brush-holder on a supporting stud, an one or more flexible straps fastened to said connecting-plate and also forming part of said clamping means.

13. As a means for clamping a brushcurved straps secured thereto.

plate having a portion bent partially around the stud and having a free outer end, a pair of stud holding straps secured to the connecting-plate at their ends and having pory tionsbent partially around the stud,- formq ing with the bent Connecting-plate a substantially cylindrical surface for the stud, 25 means for clamping the free ends of the plate andxstraps, and lugs or projections integral with the side plates extending into said longitudinal slot in the stud.

In testimony whereof I affix my signa- 30 ture, in the presence of two Witnesses.

EARLE R. KNIGHT.

holder to a stud, a plate forming part of the brush holder structure and having a Hexible curved extension, and one or more iexible s a means for clamping a brushholder to a stud, a plate forming part of the brush holder structure and having a portion form to the sh said plate and strap having free outer ends, and means for adjustably clamping together the said free outer ends.

15. In combination, a brush supporting stud having a longitudinal slot, a brushholder thereon having side plates through which the stud extends, and a connectinbl Witnesses:

CHAS. F. W. TATGENHORST, Jr., FRED J'. KINSEY. 

